Compiler
Compile NSI scripts
Installer based on ZIP file

Developer Center
Many more examples, tutorials, plug-ins and NSIS-releted software are available at the on-line Developer Center.

Documentation
NSIS Users Manual
Example scripts
Modern UI 2
Multi-User Header File
StrFunc Header File

On-line help
Forum
FAQ
IRC Channel
Bug Tracker

Plug-ins
AdvSplash - splash with fade in/out
Banner - banner with custom text
BgImage - background image
Dialer - internet connection
Math - math operations
nsDialogs - custom wizard pages
nsExec - launch command line tools
NSISdl - download files
Splash - splash screen
StartMenu - Start Menu folder selection
System - Windows API calls
VPatch - update existing files